Separable frame



Pawnee apr. 27, 1926.]

Llzg

THOMAS NYGAABD, or'ivrrnivnaroms, MINNESOTA.

SPARABLE FRAME.

Application ined March 2s, 1924.' serial N-o. 702,614.

To @ZZ whom t may concern:

Be it known that 1', THOMASMNYGAARD, a4 citizen of the United States, residing at Minneapolis, in the county of Hennepin and State oi' Minnesota, have invented certain new and' useful Improvements in Separable 'F rames; and I do hereby declare the following to be a full, clear, and exactdescriptionv of the inventiomsuch as will enable others skilled inthe art' to which it appertains to make and use the same.

My invention provides what, for lack of a better name, is hereinl designated as a separable frame, but which, morey accurately described, consists of al twopart frame or body, the members of which are separated by a-parting channelV and are connected by links or chamiral-bridging members, which, one at a: time, will release to permit passage ol anobject through the parting channel, while, -at the samek time, a multiplicity ofl the bridge-acting linksr will hold thel twoframe or body members securely connected or locked together.

This improved device is thought to be broadly new,` even as a new mechanical movement or as a device of general utility, and irrespective of any specific use. No attempt will be herein made to enumerate thev various possible uses, except the oneindicated in the drawings, wherein the device 1s shown as applied to connect brush members in such a manner that the .brush may bepushed or drawn straddle of a seat leg, desk leg, post or the like. Y

The principle broadly involved in this invention is embodied in the device illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views. f l

Referring to the drawings Fig. 1 isv a plan view with some ,parts sectioned, illustrating the invention incorporated in a floor brush suitable for use in 'sweeping school lo'ors; n

Fig. 2,is a detaihin. section uon the line 2 2` of Figi. 1 and Fig. 3 is a fragmentary view illustrating a modified form of the device. i

In. the particular adaptation of the invention illustrated, a right-hand series ofy floor brushes 3 are riveted or otherwise s`ecured to a commen bar 4 and a leftj-hand series el" brushes 5 are likewise securd'to a common bar.. The bars l and 6, asfshown, are preferably flat steel bars inpfarallel ar# rangement, spaced to ati'ord a parting channel 7. rllhe bars -l and6 constitute the iframe or body members or sections.

Chan-nel bridging and bar-'coimecting links 8 are pivoted to the bar A1, as shown, by small nut-equipped bolts 9, and similar links 10,l are pivotally,connected to the rbar G'by nut-equipped bolts 11.. The links 8 and l() are alternated .longitudinally of the bars or frame members 4 and 6 and, preferably, cach link comprises an upper and a lower .dat metal strap placed one above and one below the bar to which they are pivoted, and preferably, lalso, light coiled springs 12 are placed on the pivot bolts and compressed between the nutsthereoii andv the top straps of the respective links, as best shown in Fig. These coiled springs 12 have extended ari-ns, one arm of each spring; being anchored to the bar 4 or 6 and the other arm acting on a lug"l3 on the cooperating link and, exerting ron said links yielding force tending to hold the same downward or forward in respect to Fig. 1. At their free ends, the lin-ks 84 and l0, between their upper and lower straps. are provided with small roller-equipped pins ll that normally engage segmental slots 15 formed in thebars G and 4. The segmental slots 15 are'liormed on arcs of circles, the centers of which are coincident with the axes of lthe respective s Ylink pivots, so that any onelink may be freely moved upward or rearward in re spec-t to vFig. 1, against the tension of the cooperating `springs 12. Pivotalv movements of the links under the action of the springs 12, as shown, are limited by small stop pins 16 on the bars 4 and 6 and which, as shown, engage in segmental notches 17 in the short ends of the upper ,straps of the'links.- f

It is highlyfimportant to note-'that the links' 8 and lOrare slightly oblique to lines drawn perpendicular lto the facing edges of the bars Lland 6 and, moreover, that said links 8 are oblique in the one direction and the links 10 are oblique in the opposite `direction, lso .that the links 8 and 10 are not parallel, but, on the contrary, stand at an angle to each other kand together form a truss connection between the barslor members i and 6. The importance of this will be understood when it is considered .that the bar al can be moved longitudinally in respect to the bar 6, or conversely, only by simul` and by movements permitting the bars 4 and G to partake of parallel movements either toward or from each other. To illustrate this point more detinitely, suppose that an attempt is made to move the bar in the direction ot the arrow marked thereon in Fig. l, ahead of the bar 6. The links 8 would tend to permit such movement ,by swinging backward at their` tree ends and causingthe two bars 4 and 6 to approach each other, but the links l0 tend to-permit such advance movement ot the bar 4 by causing the two bars 4 and 6 'to move tai-ther away from each other, and obviously, these two conflicting' lateral movements ot the bars 4 and (l cannot take place and, hence,

the links 8 and lO securely tie the bars 4 .and 6 together and form a truss that will cause them always to partake ot common longitudinal or traveling movements in either direction.

In the application of the invention as a floor brush, a suitable handle 1S is 'provided and this is shown as secured in the socket "1 19 of .a bracket 20, the arms or which are rigidly secured to the bar or trame member 4. ln Fig'. l, the legs of a school desk or seat or the like are shown in section and marked by the numeral 21.

1t will now be assumed that the brush constructed as described is to be used as a i'loor brush and to simultaneously brush the floor on both sides of the legs 2l. The complete brush is forced forward in the direction ot' the arrows marked on the bars 4 and (i in Fig. l, so that the links S and l0 will be thrown in succession against said legs. Vhen any link is pressed against a leg, post or the like, its spring l2 will yield and the said link will move on its pivot, thereby carrying its roller-equipped stud 14 out ci the cooperating)- segmental slot l5, thus pcr mitting the leg` to pass into the parting' channel 7 and to be passed completely through said parting channel between the frame bars or members 4 and 6. To permit the links S and l0 to be moved complet-ely over the respective bars 4 and (l, said bars are shown as provided with. notches Q2 into which the roller-equipped studs 14 may be moved. Ol' course, as soon as a particular pivoted linkis released, its spring will throw it back again into interlmzking` engagement with the.v

cooperating segmental notch Obviously, the device, working; described, will permit the brush to be moved straddle ot and past a fixed object, such as `a desk or chair leg, and, et course, it would alsopermit a moving post or object to pass through the parting channel or betweenk the members of the frame or body.

From consideration ot the above, it willV be understood that it all of the connecting links should he simultaneously thrown into releasing positions, the two bars or trarne members would then be completely separated and there would be no provision tor causing' the links to automatically reconnect thel same. However, the connecting links are such in number that there will always be a suiiicient numb-er thcreo'tI remaining operative to hold the two 'iframe members connected while other links are moving` to clear or permit the passage of the object going through the parting channel.

As already indicated, the use ot' this improved device broadly is not limited to its use in connection with a brush nor to any other one particular purpose, and it will be li'urther understood that the invention is capable ot use to connect 'trame or body members, whether spaced on straight, pai-ah lel or on concentric lines. The gist ot the invention broadly is found in the arrangement whereby a plurality ol` links or chair ncl-bridging connections serve to hold together two frame sections or body members, but wherein the individual links or channelbridging connections are displaceable, one vor several at a time and progressively to permit a post or other member to pass through or to be passed through the channel between the said frame sections or body members.

In the modilied construction illustrated in Fig. 3, the body member 4a is in the form ot a ring secured by arms 23 to a revolving' shaft 24. The outer body member 6a is in the form of a ring but is concentric to the ring 4a, These two annular bodv members 4 and 6 are connected by links 8 and l0n hat correspond to the links 8 and 10 before described in all ot their actions. Certain other' parts illustrated in Fig. 8, that correspond to parts described in the structure illustrated in Figs. l. and Q., are indicated by the same characters hitherto applied but with the added exponent a. In this arrangement, 2l:L may be assumed to be a lixed post located between the members 4n and G and which will successively displace the links 8a and l0 when the two body members arerotated on the` axis ot thc shaft 24.

hat I claim is:

l. The combination with spaced body members7 ot a multiplicity ot yielding bor ycoupling elements normally connecting, said body members but displaceable, one or several at a time, to permit an object to pass between said members, the said coupling ele ments being` automatically restored to cou pling positions when relieved from pressure from the object passino,- between'the said members.

The combination with spaced body members, ot a multiplicity of displaceable links each being attached to. one ot said body members and having detachable interlocking engagement with the other of'said members. said links being yieldingly held in interlocking positions but displaceable, one

or several at a time, to permit an object to pass between said members while certain of the operatively positioned links hold the said body member connected.

3. The .combination with spaced body members, of a multiplicity of displaceable links alternately pivoted to said two body members and having detachably interlocking engagement with the members to which they are not pivoted, said links being yieldingly held in operative position but arranged to be progressively displaced, one or several at a time, to permit an object to pass between said body members while said body members are held together' by certain ot' the links that are in operative positions.

at. The combination with spaced body members, of a multiplicity of links alternately pivoted to said two body members andk having detachable interlocking engagement with the members to which they are not pivoted, said links being yieldingly held in operative positions but arranged to be progressively displaced, one or several at a time,

to permit an object to pass between saidL body members While said body members are held together by certain of the links that are in operative positions, the links that are pivoted to the one body member being at an angle to the links that are pivoted to the other body member, when the links are in operative position, thereby forming a truss that holds the said body members constantly spaced.

5. The structure defined' in claim 3 in further combination with stops limiting the movements of said links in directions toward their operative positions.

6. The structure defined in claim t in turther combination with stops limiting the movements of said links in directions toward their operative positions.

7. The structure defined in claim 3 in which said links at their free ends have studs and the said body members have segmental slots to receive said studs, the said segmental slots being struck on the arcsl of circles, the centers oit which are the axes of the pivots of they respective cooperating links.

8. The structure'delined in claim 3 in which said links are made of upper and lower metal straps having studs connecting their spaced tree ends, the said body members having segmental slots to receive said studs and the said segmental slots being struck from the arcs or' circles, the centers of which are the axes of the pivots of respective cooperating links;

9. The structure deiined in claim l in furW n ther combination with brushes connectedto said body members and adapted to be moved on oppositesides of an object.

l0. lThe structure defined in claim 3 in further combination. with brushes connected to said body members and adapted to be moved on 'opposite sides of an object.

In testimony whereof I aflix my signature.

THOMAS N YGAARD.

Ace 

